SIPCORE                                                      A. B.
Internet Engineering Task Force (IETF)                        A.B. Roach
Internet-Draft
Request for Comments: 6878                                       Mozilla
Updates: 3261 (if approved)                            December 14, 2012
Intended status:                                              February 2013
Category: Standards Track
Expires: June 17, 2013
ISSN: 2070-1721

        IANA Registry for the Session Initiation Protocol (SIP)
                        "Priority" Header Field
                     draft-ietf-sipcore-priority-00

Abstract

   This document defines a new IANA registry to keep track of the values
   defined for the Session Initiation Protocol (SIP) "Priority" header
   field.  It updates RFC 3261.

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   This Internet-Draft will expire on June 17, 2013.
   http://www.rfc-editor.org/info/rfc6878.

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   document authors.  All rights reserved.

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1.  Introduction

   This document defines a new IANA registry to keep track of the values
   defined for the Session Initiation Protocol (SIP) "Priority" header
   field.  This header field was defined in [RFC3261], section Section 20.26.
   It was clearly specified in a way that allows for the creation of new
   values beyond those originally specified; however, no registry has
   been established for it.

2.  IANA Considerations

   This document adds a new registry, sub-registry, "Priority Header Field Values."
   Values", to the "Session Initiation Protocol (SIP) Parameters"
   registry page.  Its format and initial values are as shown in the
   following table:

                        +------------+-----------+
                        | Priority   | Reference |
                        +------------+-----------+
                        | non-urgent | RFC 3261  |
                        | normal     | RFC 3261  |
                        | urgent     | RFC 3261  |
                        | emergency  | RFC 3261  |
                        +------------+-----------+

   The policy for registration of values in this registry is "IETF
   Review,"
   Review" as that term is defined by [RFC5226].  This policy was chosen
   over lighter-weight policies due the potential architectural impact
   of the semantics associated with new values.  Efforts contemplating
   adding a Priority value should consider whether the SIP Resource-
   Priority [RFC4412] or even a different protocol would be more
   appropriate for achieving their requirements.

3.  Security Considerations

   This document does not have any impact on the security of the SIP
   protocol.  Its purpose is purely administrative in nature.

4.  References

4.1.  Normative References

   [RFC3261]  Rosenberg, J., Schulzrinne, H., Camarillo, G., Johnston,
              A., Peterson, J., Sparks, R., Handley, M., and E.
              Schooler, "SIP: Session Initiation Protocol", RFC 3261,
              June 2002.

   [RFC5226]  Narten, T. and H. Alvestrand, "Guidelines for Writing an
              IANA Considerations Section in RFCs", BCP 26, RFC 5226,
              May 2008.

Appendix A.  Acknowledgements

   TBD

4.2.  Informative References

   [RFC4412]  Schulzrinne, H. and J. Polk, "Communications Resource
              Priority for the Session Initiation Protocol (SIP)",
              RFC 4412, February 2006.

Author's Address

   Adam Roach
   Mozilla
   Dallas, TX
   US

   Email:

   EMail: adam@nostrum.com